Use code ONREPEAT at checkout for 65% off up to $65 on Auto-Refill Orders.

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*Coupon terms and conditions: code PUMPKIN30 applicable for one-time or Subscribe & Save orders. Product exclusions apply. Excluded products include but are not limited to Azodyl, Bravecto, Bravecto Plus, Droncit, Incurin, Mometamax, Numelvi, Optimmune, Posatex, Sentinel, Tri-Heart Plus, VetPen, Vetsulin, compounded and refrigerated medications. Manufacturer promotional maximums may apply. Offer valid through October 18, 2026.

Use code ROYAL35 at checkout for 35% off up to $20 on your first Royal Canin Subscribe & Save order.*

*Coupon terms and conditions: code ROYAL35 applicable for first-time Subscribe & Save orders only. Promotional code valid through December 31, 2026. Manufacturer promotional maximums may apply.

Use code PUMPKIN50 at checkout for $50 off your next order of $150 or more.*

*Coupon terms and conditions: code PUMPKIN50 applicable for one-time or Subscribe & Save orders. Product exclusions apply. Excluded products include but are not limited to Azodyl, Bravecto, Bravecto Plus, Droncit, Incurin, Mometamax, Numelvi, Optimmune, Posatex, Sentinel, Tri-Heart Plus, VetPen, Vetsulin, compounded and refrigerated medications. Manufacturer promotional maximums may apply. Offer valid through October 18, 2026.

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Immune support supplements for dogs to help strengthen natural defenses. Trusted care from Koala Health.

Immune Support for Dogs

immune support

Cyclosporine (Atopica) is used to suppress the immune system to treat allergic skin and immune-mediated conditions.

Atopica for Dogs

Azathioprine is used to suppress the immune system to treat immune-mediated conditions.

Azathioprine

Diphenhydramine (Calmatrol) is an antihistamine used to treat allergic reactions and itchiness due to allergies.

Calmatrol

Cyclosporine (Cyclavance) is used to suppress the immune system to treat allergic skin and immune-mediated conditions.

Cyclavance

Cyclosporine is used to suppress the immune system to treat allergic skin and immune-mediated conditions.

Cyclosporine

Mycophenolate is used to suppress the immune system to treat immune-mediated conditions.

Mycophenolate

Prednisone and prednisolone are steroids used to treat a wide variety of dog illnesses including inflammatory conditions, immune-mediated diseases, certain cancers, and Addison's disease (hypoadrenocorticism).

Prednisone

Prednisone and prednisolone (PrednisTabs) are steroids used to treat a wide variety of dog and cat illnesses including inflammatory conditions, immune-mediated diseases, certain cancers, and Addison's disease (hypoadrenocorticism).

PrednisTabs

Diphenhydramine (Vetadryl) is an antihistamine used to treat allergic reactions and itchiness due to allergies.